lustre/include/linux/lustre_compat25.h

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #ifndef _LINUX_COMPAT25_H
  38 #define _LINUX_COMPAT25_H
  39
  40 #ifdef __KERNEL__
  41
  42 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,9)
  43 #error sorry, lustre requires at least linux kernel 2.6.9 or later
  44 #endif
  45
  46 #include <linux/fs_struct.h>
  47 #include <libcfs/linux/portals_compat25.h>
  48
  49 #include <linux/lustre_patchless_compat.h>
  50
  51 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14)
  52 struct ll_iattr {
  53         struct iattr    iattr;
  54         unsigned int    ia_attr_flags;
  55 };
  56 #else
  57 #define ll_iattr iattr
  58 #endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,14) */
  59
  60 #ifdef HAVE_FS_STRUCT_USE_PATH
  61 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  62                                  struct dentry *dentry)
  63 {
  64         struct path path;
  65         struct path old_pwd;
  66
  67         path.mnt = mnt;
  68         path.dentry = dentry;
  69         write_lock(&fs->lock);
  70         old_pwd = fs->pwd;
  71         path_get(&path);
  72         fs->pwd = path;
  73         write_unlock(&fs->lock);
  74
  75         if (old_pwd.dentry)
  76                 path_put(&old_pwd);
  77 }
  78
  79 #else
  80
  81 static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
  82                 struct dentry *dentry)
  83 {
  84         struct dentry *old_pwd;
  85         struct vfsmount *old_pwdmnt;
  86
  87         cfs_write_lock(&fs->lock);
  88         old_pwd = fs->pwd;
  89         old_pwdmnt = fs->pwdmnt;
  90         fs->pwdmnt = mntget(mnt);
  91         fs->pwd = dget(dentry);
  92         cfs_write_unlock(&fs->lock);
  93
  94         if (old_pwd) {
  95                 dput(old_pwd);
  96                 mntput(old_pwdmnt);
  97         }
  98 }
  99 #endif
 100
 101 /*
 102  * set ATTR_BLOCKS to a high value to avoid any risk of collision with other
 103  * ATTR_* attributes (see bug 13828)
 104  */
 105 #define ATTR_BLOCKS    (1 << 27)
 106
 107 #if HAVE_INODE_I_MUTEX
 108 #define UNLOCK_INODE_MUTEX(inode) \
 109 do {cfs_mutex_unlock(&(inode)->i_mutex); } while(0)
 110 #define LOCK_INODE_MUTEX(inode) \
 111 do {cfs_mutex_lock(&(inode)->i_mutex); } while(0)
 112 #define LOCK_INODE_MUTEX_PARENT(inode) \
 113 do {cfs_mutex_lock_nested(&(inode)->i_mutex, I_MUTEX_PARENT); } while(0)
 114 #define TRYLOCK_INODE_MUTEX(inode) cfs_mutex_trylock(&(inode)->i_mutex)
 115 #else
 116 #define UNLOCK_INODE_MUTEX(inode) do  cfs_up(&(inode)->i_sem); } while(0)
 117 #define LOCK_INODE_MUTEX(inode) do  cfs_down(&(inode)->i_sem); } while(0)
 118 #define TRYLOCK_INODE_MUTEX(inode) (!down_trylock(&(inode)->i_sem))
 119 #define LOCK_INODE_MUTEX_PARENT(inode) LOCK_INODE_MUTEX(inode)
 120 #endif /* HAVE_INODE_I_MUTEX */
 121
 122 #ifdef HAVE_SEQ_LOCK
 123 #define LL_SEQ_LOCK(seq) cfs_mutex_lock(&(seq)->lock)
 124 #define LL_SEQ_UNLOCK(seq) cfs_mutex_unlock(&(seq)->lock)
 125 #else
 126 #define LL_SEQ_LOCK(seq) cfs_down(&(seq)->sem)
 127 #define LL_SEQ_UNLOCK(seq) cfs_up(&(seq)->sem)
 128 #endif
 129
 130 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
 131 #define d_child d_u.d_child
 132 #define d_rcu d_u.d_rcu
 133 #endif
 134
 135 #ifdef HAVE_DQUOTOFF_MUTEX
 136 #define UNLOCK_DQONOFF_MUTEX(dqopt) cfs_mutex_unlock(&(dqopt)->dqonoff_mutex)
 137 #define LOCK_DQONOFF_MUTEX(dqopt) cfs_mutex_lock(&(dqopt)->dqonoff_mutex)
 138 #else
 139 #define UNLOCK_DQONOFF_MUTEX(dqopt) cfs_up(&(dqopt)->dqonoff_sem)
 140 #define LOCK_DQONOFF_MUTEX(dqopt) cfs_down(&(dqopt)->dqonoff_sem)
 141 #endif /* HAVE_DQUOTOFF_MUTEX */
 142
 143 #define current_ngroups current_cred()->group_info->ngroups
 144 #define current_groups current_cred()->group_info->small_block
 145
 146 #ifndef page_private
 147 #define page_private(page) ((page)->private)
 148 #define set_page_private(page, v) ((page)->private = (v))
 149 #endif
 150
 151 #ifndef HAVE_GFP_T
 152 #define gfp_t int
 153 #endif
 154
 155 #define lock_dentry(___dentry)          cfs_spin_lock(&(___dentry)->d_lock)
 156 #define unlock_dentry(___dentry)        cfs_spin_unlock(&(___dentry)->d_lock)
 157
 158 #define ll_kernel_locked()      kernel_locked()
 159
 160 /*
 161  * OBD need working random driver, thus all our
 162  * initialization routines must be called after device
 163  * driver initialization
 164  */
 165 #ifndef MODULE
 166 #undef module_init
 167 #define module_init(a)     late_initcall(a)
 168 #endif
 169
 170 /* XXX our code should be using the 2.6 calls, not the other way around */
 171 #ifdef HAVE_TRYLOCK_PAGE
 172 #define TestSetPageLocked(page)         (!trylock_page(page))
 173 #endif
 174
 175 #define Page_Uptodate(page)             PageUptodate(page)
 176 #define ll_redirty_page(page)           set_page_dirty(page)
 177
 178 #define KDEVT_INIT(val)                 (val)
 179
 180 #define LTIME_S(time)                   (time.tv_sec)
 181 #define ll_path_lookup                  path_lookup
 182 #define ll_permission(inode,mask,nd)    permission(inode,mask,nd)
 183
 184 #define ll_pgcache_lock(mapping)          cfs_spin_lock(&mapping->page_lock)
 185 #define ll_pgcache_unlock(mapping)        cfs_spin_unlock(&mapping->page_lock)
 186 #define ll_call_writepage(inode, page)  \
 187                                 (inode)->i_mapping->a_ops->writepage(page, NULL)
 188 #define ll_invalidate_inode_pages(inode) \
 189                                 invalidate_inode_pages((inode)->i_mapping)
 190 #define ll_truncate_complete_page(page) \
 191                                 truncate_complete_page(page->mapping, page)
 192
 193 #define ll_vfs_create(a,b,c,d)          vfs_create(a,b,c,d)
 194 #define ll_dev_t                        dev_t
 195 #define kdev_t                          dev_t
 196 #define to_kdev_t(dev)                  (dev)
 197 #define kdev_t_to_nr(dev)               (dev)
 198 #define val_to_kdev(dev)                (dev)
 199
 200 #ifdef HAVE_BLKDEV_PUT_2ARGS
 201 #define ll_blkdev_put(a, b) blkdev_put(a, b)
 202 #else
 203 #define ll_blkdev_put(a, b) blkdev_put(a)
 204 #endif
 205
 206 #ifdef HAVE_DENTRY_OPEN_4ARGS
 207 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c, d)
 208 #else
 209 #define ll_dentry_open(a, b, c, d) dentry_open(a, b, c)
 210 #endif
 211
 212 #include <linux/writeback.h>
 213
 214 static inline int cfs_cleanup_group_info(void)
 215 {
 216         struct group_info *ginfo;
 217
 218         ginfo = groups_alloc(0);
 219         if (!ginfo)
 220                 return -ENOMEM;
 221
 222         set_current_groups(ginfo);
 223         put_group_info(ginfo);
 224
 225         return 0;
 226 }
 227
 228 #define __set_page_ll_data(page, llap) \
 229         do {       \
 230                 page_cache_get(page); \
 231                 SetPagePrivate(page); \
 232                 set_page_private(page, (unsigned long)llap); \
 233         } while (0)
 234 #define __clear_page_ll_data(page) \
 235         do {       \
 236                 ClearPagePrivate(page); \
 237                 set_page_private(page, 0); \
 238                 page_cache_release(page); \
 239         } while(0)
 240
 241 #define kiobuf bio
 242
 243 #include <linux/proc_fs.h>
 244
 245 #if !defined(HAVE_D_REHASH_COND) && defined(HAVE___D_REHASH)
 246 #define d_rehash_cond(dentry, lock) __d_rehash(dentry, lock)
 247 extern void __d_rehash(struct dentry *dentry, int lock);
 248 #endif
 249
 250 #if !defined(HAVE_D_MOVE_LOCKED) && defined(HAVE___D_MOVE)
 251 #define d_move_locked(dentry, target) __d_move(dentry, target)
 252 extern void __d_move(struct dentry *dentry, struct dentry *target);
 253 #endif
 254
 255 #ifdef HAVE_CAN_SLEEP_ARG
 256 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 257         flock_lock_file_wait(file, lock, can_sleep)
 258 #else
 259 #define ll_flock_lock_file_wait(file, lock, can_sleep) \
 260         flock_lock_file_wait(file, lock)
 261 #endif
 262
 263 #define CheckWriteback(page, cmd) \
 264         ((!PageWriteback(page) && (cmd & OBD_BRW_READ)) || \
 265          (PageWriteback(page) && (cmd & OBD_BRW_WRITE)))
 266
 267 #ifdef HAVE_PAGE_LIST
 268 static inline int mapping_has_pages(struct address_space *mapping)
 269 {
 270         int rc = 1;
 271
 272         ll_pgcache_lock(mapping);
 273         if (cfs_list_empty(&mapping->dirty_pages) &&
 274             cfs_list_empty(&mapping->clean_pages) &&
 275             cfs_list_empty(&mapping->locked_pages)) {
 276                 rc = 0;
 277         }
 278         ll_pgcache_unlock(mapping);
 279
 280         return rc;
 281 }
 282 #else
 283 static inline int mapping_has_pages(struct address_space *mapping)
 284 {
 285         return mapping->nrpages > 0;
 286 }
 287 #endif
 288
 289 #ifdef HAVE_KIOBUF_KIO_BLOCKS
 290 #define KIOBUF_GET_BLOCKS(k) ((k)->kio_blocks)
 291 #else
 292 #define KIOBUF_GET_BLOCKS(k) ((k)->blocks)
 293 #endif
 294
 295 #ifdef HAVE_SECURITY_PLUG
 296 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 297                 vfs_symlink(dir, dentry, mnt, path, mode)
 298 #else
 299 #ifdef HAVE_4ARGS_VFS_SYMLINK
 300 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 301                 vfs_symlink(dir, dentry, path, mode)
 302 #else
 303 #define ll_vfs_symlink(dir, dentry, mnt, path, mode) \
 304                        vfs_symlink(dir, dentry, path)
 305 #endif
 306
 307 #define ll_set_dflags(dentry, flags) do { \
 308                 cfs_spin_lock(&dentry->d_lock); \
 309                 dentry->d_flags |= flags; \
 310                 cfs_spin_unlock(&dentry->d_lock); \
 311         } while(0)
 312 #endif
 313
 314 #ifndef container_of
 315 #define container_of(ptr, type, member) ({                      \
 316                 const typeof( ((type *)0)->member ) *__mptr = (ptr); \
 317                 (type *)( (char *)__mptr - offsetof(type,member) );})
 318 #endif
 319
 320 #define UP_WRITE_I_ALLOC_SEM(i)   up_write(&(i)->i_alloc_sem)
 321 #define DOWN_WRITE_I_ALLOC_SEM(i) down_write(&(i)->i_alloc_sem)
 322 #define LASSERT_I_ALLOC_SEM_WRITE_LOCKED(i) LASSERT(down_read_trylock(&(i)->i_alloc_sem) == 0)
 323
 324 #define UP_READ_I_ALLOC_SEM(i)    up_read(&(i)->i_alloc_sem)
 325 #define DOWN_READ_I_ALLOC_SEM(i)  down_read(&(i)->i_alloc_sem)
 326 #define LASSERT_I_ALLOC_SEM_READ_LOCKED(i) LASSERT(down_write_trylock(&(i)->i_alloc_sem) == 0)
 327
 328 #ifndef HAVE_GRAB_CACHE_PAGE_NOWAIT_GFP
 329 #define grab_cache_page_nowait_gfp(x, y, z) grab_cache_page_nowait((x), (y))
 330 #endif
 331
 332 #include <linux/mpage.h>        /* for generic_writepages */
 333 #ifndef HAVE_FILEMAP_FDATAWRITE_RANGE
 334 #include <linux/backing-dev.h>  /* for mapping->backing_dev_info */
 335 static inline int filemap_fdatawrite_range(struct address_space *mapping,
 336                                            loff_t start, loff_t end)
 337 {
 338         int rc;
 339         struct writeback_control wbc = {
 340                 .sync_mode = WB_SYNC_ALL,
 341                 .nr_to_write = (end - start + PAGE_SIZE - 1) >> PAGE_SHIFT,
 342         };
 343
 344 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
 345         wbc.range_start = start;
 346         wbc.range_end = end;
 347 #else
 348         wbc.start = start;
 349         wbc.end = end;
 350 #endif
 351
 352 #ifdef HAVE_MAPPING_CAP_WRITEBACK_DIRTY
 353         if (!mapping_cap_writeback_dirty(mapping))
 354                 rc = 0;
 355 #else
 356         if (mapping->backing_dev_info->memory_backed)
 357                 rc = 0;
 358 #endif
 359         /* do_writepages() */
 360         else if (mapping->a_ops->writepages)
 361                 rc = mapping->a_ops->writepages(mapping, &wbc);
 362         else
 363                 rc = generic_writepages(mapping, &wbc);
 364         return rc;
 365 }
 366 #else
 367 int filemap_fdatawrite_range(struct address_space *mapping,
 368                              loff_t start, loff_t end);
 369 #endif /* HAVE_FILEMAP_FDATAWRITE_RANGE */
 370
 371 #ifdef HAVE_VFS_KERN_MOUNT
 372 static inline struct vfsmount *
 373 ll_kern_mount(const char *fstype, int flags, const char *name, void *data)
 374 {
 375         struct file_system_type *type = get_fs_type(fstype);
 376         struct vfsmount *mnt;
 377         if (!type)
 378                 return ERR_PTR(-ENODEV);
 379         mnt = vfs_kern_mount(type, flags, name, data);
 380         cfs_module_put(type->owner);
 381         return mnt;
 382 }
 383 #else
 384 #define ll_kern_mount(fstype, flags, name, data) do_kern_mount((fstype), (flags), (name), (data))
 385 #endif
 386
 387 #ifdef HAVE_STATFS_DENTRY_PARAM
 388 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb)->s_root, (sfs))
 389 #else
 390 #define ll_do_statfs(sb, sfs) (sb)->s_op->statfs((sb), (sfs))
 391 #endif
 392
 393 #ifndef HAVE_SB_TIME_GRAN
 394 #ifndef HAVE_S_TIME_GRAN
 395 #error Need s_time_gran patch!
 396 #endif
 397 static inline u32 get_sb_time_gran(struct super_block *sb)
 398 {
 399         return sb->s_time_gran;
 400 }
 401 #endif
 402
 403 #ifdef HAVE_RW_TREE_LOCK
 404 #define TREE_READ_LOCK_IRQ(mapping)     read_lock_irq(&(mapping)->tree_lock)
 405 #define TREE_READ_UNLOCK_IRQ(mapping) read_unlock_irq(&(mapping)->tree_lock)
 406 #else
 407 #define TREE_READ_LOCK_IRQ(mapping) cfs_spin_lock_irq(&(mapping)->tree_lock)
 408 #define TREE_READ_UNLOCK_IRQ(mapping) cfs_spin_unlock_irq(&(mapping)->tree_lock)
 409 #endif
 410
 411 #ifdef HAVE_UNREGISTER_BLKDEV_RETURN_INT
 412 #define ll_unregister_blkdev(a,b)       unregister_blkdev((a),(b))
 413 #else
 414 static inline
 415 int ll_unregister_blkdev(unsigned int dev, const char *name)
 416 {
 417         unregister_blkdev(dev, name);
 418         return 0;
 419 }
 420 #endif
 421
 422 #ifdef HAVE_INVALIDATE_BDEV_2ARG
 423 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a),(b))
 424 #else
 425 #define ll_invalidate_bdev(a,b)         invalidate_bdev((a))
 426 #endif
 427
 428 #ifdef HAVE_INODE_BLKSIZE
 429 #define ll_inode_blksize(a)     (a)->i_blksize
 430 #else
 431 #define ll_inode_blksize(a)     (1<<(a)->i_blkbits)
 432 #endif
 433
 434 #ifdef HAVE_FS_RENAME_DOES_D_MOVE
 435 #define LL_RENAME_DOES_D_MOVE   FS_RENAME_DOES_D_MOVE
 436 #else
 437 #define LL_RENAME_DOES_D_MOVE   FS_ODD_RENAME
 438 #endif
 439
 440 #ifndef HAVE_D_OBTAIN_ALIAS
 441 #define d_obtain_alias(inode) d_alloc_anon(inode)
 442 #endif
 443
 444 /* add a lustre compatible layer for crypto API */
 445 #include <linux/crypto.h>
 446 #ifdef HAVE_ASYNC_BLOCK_CIPHER
 447 #define ll_crypto_hash          crypto_hash
 448 #define ll_crypto_cipher        crypto_blkcipher
 449 #define ll_crypto_alloc_hash(name, type, mask)  crypto_alloc_hash(name, type, mask)
 450 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_hash_setkey(tfm, key, keylen)
 451 #define ll_crypto_hash_init(desc)               crypto_hash_init(desc)
 452 #define ll_crypto_hash_update(desc, sl, bytes)  crypto_hash_update(desc, sl, bytes)
 453 #define ll_crypto_hash_final(desc, out)         crypto_hash_final(desc, out)
 454 #define ll_crypto_alloc_blkcipher(name, type, mask) \
 455                 crypto_alloc_blkcipher(name ,type, mask)
 456 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 457                 crypto_blkcipher_setkey(tfm, key, keylen)
 458 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 459                 crypto_blkcipher_set_iv(tfm, src, len)
 460 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 461                 crypto_blkcipher_get_iv(tfm, dst, len)
 462 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 463                 crypto_blkcipher_encrypt(desc, dst, src, bytes)
 464 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 465                 crypto_blkcipher_decrypt(desc, dst, src, bytes)
 466 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 467                 crypto_blkcipher_encrypt_iv(desc, dst, src, bytes)
 468 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 469                 crypto_blkcipher_decrypt_iv(desc, dst, src, bytes)
 470
 471 static inline int ll_crypto_hmac(struct ll_crypto_hash *tfm,
 472                                  u8 *key, unsigned int *keylen,
 473                                  struct scatterlist *sg,
 474                                  unsigned int size, u8 *result)
 475 {
 476         struct hash_desc desc;
 477         int              rv;
 478         desc.tfm   = tfm;
 479         desc.flags = 0;
 480         rv = crypto_hash_setkey(desc.tfm, key, *keylen);
 481         if (rv) {
 482                 CERROR("failed to hash setkey: %d\n", rv);
 483                 return rv;
 484         }
 485         return crypto_hash_digest(&desc, sg, size, result);
 486 }
 487 static inline
 488 unsigned int ll_crypto_tfm_alg_max_keysize(struct crypto_blkcipher *tfm)
 489 {
 490         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.max_keysize;
 491 }
 492 static inline
 493 unsigned int ll_crypto_tfm_alg_min_keysize(struct crypto_blkcipher *tfm)
 494 {
 495         return crypto_blkcipher_tfm(tfm)->__crt_alg->cra_blkcipher.min_keysize;
 496 }
 497
 498 #define ll_crypto_hash_blocksize(tfm)       crypto_hash_blocksize(tfm)
 499 #define ll_crypto_hash_digestsize(tfm)      crypto_hash_digestsize(tfm)
 500 #define ll_crypto_blkcipher_ivsize(tfm)     crypto_blkcipher_ivsize(tfm)
 501 #define ll_crypto_blkcipher_blocksize(tfm)  crypto_blkcipher_blocksize(tfm)
 502 #define ll_crypto_free_hash(tfm)            crypto_free_hash(tfm)
 503 #define ll_crypto_free_blkcipher(tfm)       crypto_free_blkcipher(tfm)
 504 #else /* HAVE_ASYNC_BLOCK_CIPHER */
 505 #include <linux/scatterlist.h>
 506 #define ll_crypto_hash          crypto_tfm
 507 #define ll_crypto_cipher        crypto_tfm
 508 #ifndef HAVE_STRUCT_HASH_DESC
 509 struct hash_desc {
 510         struct ll_crypto_hash *tfm;
 511         u32                    flags;
 512 };
 513 #endif
 514 #ifndef HAVE_STRUCT_BLKCIPHER_DESC
 515 struct blkcipher_desc {
 516         struct ll_crypto_cipher *tfm;
 517         void                    *info;
 518         u32                      flags;
 519 };
 520 #endif
 521 #define ll_crypto_blkcipher_setkey(tfm, key, keylen) \
 522         crypto_cipher_setkey(tfm, key, keylen)
 523 #define ll_crypto_blkcipher_set_iv(tfm, src, len) \
 524         crypto_cipher_set_iv(tfm, src, len)
 525 #define ll_crypto_blkcipher_get_iv(tfm, dst, len) \
 526         crypto_cipher_get_iv(tfm, dst, len)
 527 #define ll_crypto_blkcipher_encrypt(desc, dst, src, bytes) \
 528         crypto_cipher_encrypt((desc)->tfm, dst, src, bytes)
 529 #define ll_crypto_blkcipher_decrypt(desc, dst, src, bytes) \
 530         crypto_cipher_decrypt((desc)->tfm, dst, src, bytes)
 531 #define ll_crypto_blkcipher_decrypt_iv(desc, dst, src, bytes) \
 532         crypto_cipher_decrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 533 #define ll_crypto_blkcipher_encrypt_iv(desc, dst, src, bytes) \
 534         crypto_cipher_encrypt_iv((desc)->tfm, dst, src, bytes, (desc)->info)
 535
 536 static inline
 537 struct ll_crypto_cipher *ll_crypto_alloc_blkcipher(const char * algname,
 538                                                    u32 type, u32 mask)
 539 {
 540         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 541         const char *pan = algname;
 542         u32         flag = 0;
 543
 544         if (strncmp("cbc(", algname, 4) == 0)
 545                 flag |= CRYPTO_TFM_MODE_CBC;
 546         else if (strncmp("ecb(", algname, 4) == 0)
 547                 flag |= CRYPTO_TFM_MODE_ECB;
 548         if (flag) {
 549                 char *vp = strnchr(algname, CRYPTO_MAX_ALG_NAME, ')');
 550                 if (vp) {
 551                         memcpy(buf, algname + 4, vp - algname - 4);
 552                         buf[vp - algname - 4] = '\0';
 553                         pan = buf;
 554                 } else {
 555                         flag = 0;
 556                 }
 557         }
 558         return crypto_alloc_tfm(pan, flag);
 559 }
 560
 561 static inline
 562 struct ll_crypto_hash *ll_crypto_alloc_hash(const char *alg, u32 type, u32 mask)
 563 {
 564         char        buf[CRYPTO_MAX_ALG_NAME + 1];
 565         const char *pan = alg;
 566
 567         if (strncmp("hmac(", alg, 5) == 0) {
 568                 char *vp = strnchr(alg, CRYPTO_MAX_ALG_NAME, ')');
 569                 if (vp) {
 570                         memcpy(buf, alg+ 5, vp - alg- 5);
 571                         buf[vp - alg - 5] = 0x00;
 572                         pan = buf;
 573                 }
 574         }
 575         return crypto_alloc_tfm(pan, 0);
 576 }
 577 static inline int ll_crypto_hash_init(struct hash_desc *desc)
 578 {
 579        crypto_digest_init(desc->tfm); return 0;
 580 }
 581 static inline int ll_crypto_hash_update(struct hash_desc *desc,
 582                                         struct scatterlist *sg,
 583                                         unsigned int nbytes)
 584 {
 585         struct scatterlist *sl = sg;
 586         unsigned int        count;
 587                 /*
 588                  * This way is very weakness. We must ensure that
 589                  * the sum of sg[0..i]->length isn't greater than nbytes.
 590                  * In the upstream kernel the crypto_hash_update() also
 591                  * via the nbytes computed the count of sg[...].
 592                  * The old style is more safely. but it gone.
 593                  */
 594         for (count = 0; nbytes > 0; count ++, sl ++) {
 595                 nbytes -= sl->length;
 596         }
 597         crypto_digest_update(desc->tfm, sg, count); return 0;
 598 }
 599 static inline int ll_crypto_hash_final(struct hash_desc *desc, u8 *out)
 600 {
 601         crypto_digest_final(desc->tfm, out); return 0;
 602 }
 603 static inline int ll_crypto_hmac(struct crypto_tfm *tfm,
 604                                  u8 *key, unsigned int *keylen,
 605                                  struct scatterlist *sg,
 606                                  unsigned int nbytes,
 607                                  u8 *out)
 608 {
 609         struct scatterlist *sl = sg;
 610         int                 count;
 611         for (count = 0; nbytes > 0; count ++, sl ++) {
 612                 nbytes -= sl->length;
 613         }
 614         crypto_hmac(tfm, key, keylen, sg, count, out);
 615         return 0;
 616 }
 617
 618 #define ll_crypto_hash_setkey(tfm, key, keylen) crypto_digest_setkey(tfm, key, keylen)
 619 #define ll_crypto_blkcipher_blocksize(tfm)      crypto_tfm_alg_blocksize(tfm)
 620 #define ll_crypto_blkcipher_ivsize(tfm) crypto_tfm_alg_ivsize(tfm)
 621 #define ll_crypto_hash_digestsize(tfm)  crypto_tfm_alg_digestsize(tfm)
 622 #define ll_crypto_hash_blocksize(tfm)   crypto_tfm_alg_blocksize(tfm)
 623 #define ll_crypto_free_hash(tfm)        crypto_free_tfm(tfm)
 624 #define ll_crypto_free_blkcipher(tfm)   crypto_free_tfm(tfm)
 625 #define ll_crypto_tfm_alg_min_keysize   crypto_tfm_alg_min_keysize
 626 #define ll_crypto_tfm_alg_max_keysize   crypto_tfm_alg_max_keysize
 627 #endif /* HAVE_ASYNC_BLOCK_CIPHER */
 628
 629 #ifndef HAVE_SYNCHRONIZE_RCU
 630 /* Linux 2.6.32 provides define when !CONFIG_TREE_PREEMPT_RCU */
 631 #ifndef synchronize_rcu
 632 #define synchronize_rcu() synchronize_kernel()
 633 #endif
 634 #endif
 635
 636 #ifdef HAVE_FILE_REMOVE_SUID
 637 # define ll_remove_suid(file, mnt)       file_remove_suid(file)
 638 #else
 639 # ifdef HAVE_SECURITY_PLUG
 640 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry,mnt)
 641 # else
 642 #  define ll_remove_suid(file,mnt)      remove_suid(file->f_dentry)
 643 # endif
 644 #endif
 645
 646 #ifdef HAVE_SECURITY_PLUG
 647 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry,mnt)
 648 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mnt,mode)
 649 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,mnt,dir,new,mnt1)
 650 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry,mnt)
 651 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)            \
 652                 vfs_mknod(dir,entry,mnt,mode,dev)
 653 #define ll_security_inode_unlink(dir,entry,mnt)         \
 654                 security_inode_unlink(dir,entry,mnt)
 655 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 656                 vfs_rename(old,old_dir,mnt,new,new_dir,mnt1)
 657 #else
 658 #define ll_vfs_rmdir(dir,entry,mnt)             vfs_rmdir(dir,entry)
 659 #define ll_vfs_mkdir(inode,dir,mnt,mode)        vfs_mkdir(inode,dir,mode)
 660 #define ll_vfs_link(old,mnt,dir,new,mnt1)       vfs_link(old,dir,new)
 661 #define ll_vfs_unlink(inode,entry,mnt)          vfs_unlink(inode,entry)
 662 #define ll_vfs_mknod(dir,entry,mnt,mode,dev)    vfs_mknod(dir,entry,mode,dev)
 663 #define ll_security_inode_unlink(dir,entry,mnt) security_inode_unlink(dir,entry)
 664 #define ll_vfs_rename(old,old_dir,mnt,new,new_dir,mnt1) \
 665                 vfs_rename(old,old_dir,new,new_dir)
 666 #endif /* HAVE_SECURITY_PLUG */
 667
 668 #ifdef for_each_possible_cpu
 669 #define cfs_for_each_possible_cpu(cpu) for_each_possible_cpu(cpu)
 670 #elif defined(for_each_cpu)
 671 #define cfs_for_each_possible_cpu(cpu) for_each_cpu(cpu)
 672 #endif
 673
 674 #ifndef cpu_to_node
 675 #define cpu_to_node(cpu)         0
 676 #endif
 677
 678 #ifdef HAVE_REGISTER_SHRINKER
 679 typedef int (*cfs_shrinker_t)(int nr_to_scan, gfp_t gfp_mask);
 680
 681 static inline
 682 struct shrinker *cfs_set_shrinker(int seek, cfs_shrinker_t func)
 683 {
 684         struct shrinker *s;
 685
 686         s = kmalloc(sizeof(*s), GFP_KERNEL);
 687         if (s == NULL)
 688                 return (NULL);
 689
 690         s->shrink = func;
 691         s->seeks = seek;
 692
 693         register_shrinker(s);
 694
 695         return s;
 696 }
 697
 698 static inline
 699 void cfs_remove_shrinker(struct shrinker *shrinker)
 700 {
 701         if (shrinker == NULL)
 702                 return;
 703
 704         unregister_shrinker(shrinker);
 705         kfree(shrinker);
 706 }
 707 #endif
 708
 709 #ifdef HAVE_BIO_ENDIO_2ARG
 710 #define cfs_bio_io_error(a,b)   bio_io_error((a))
 711 #define cfs_bio_endio(a,b,c)    bio_endio((a),(c))
 712 #else
 713 #define cfs_bio_io_error(a,b)   bio_io_error((a),(b))
 714 #define cfs_bio_endio(a,b,c)    bio_endio((a),(b),(c))
 715 #endif
 716
 717 #ifdef HAVE_FS_STRUCT_USE_PATH
 718 #define cfs_fs_pwd(fs)       ((fs)->pwd.dentry)
 719 #define cfs_fs_mnt(fs)       ((fs)->pwd.mnt)
 720 #define cfs_path_put(nd)     path_put(&(nd)->path)
 721 #else
 722 #define cfs_fs_pwd(fs)       ((fs)->pwd)
 723 #define cfs_fs_mnt(fs)       ((fs)->pwdmnt)
 724 #define cfs_path_put(nd)     path_release(nd)
 725 #endif
 726
 727 #ifndef abs
 728 static inline int abs(int x)
 729 {
 730         return (x < 0) ? -x : x;
 731 }
 732 #endif
 733
 734 #ifndef labs
 735 static inline long labs(long x)
 736 {
 737         return (x < 0) ? -x : x;
 738 }
 739 #endif /* HAVE_REGISTER_SHRINKER */
 740
 741 #ifdef HAVE_INVALIDATE_INODE_PAGES
 742 #define invalidate_mapping_pages(mapping,s,e) invalidate_inode_pages(mapping)
 743 #endif
 744
 745 #ifdef HAVE_INODE_IPRIVATE
 746 #define INODE_PRIVATE_DATA(inode)       ((inode)->i_private)
 747 #else
 748 #define INODE_PRIVATE_DATA(inode)       ((inode)->u.generic_ip)
 749 #endif
 750
 751 #ifndef SLAB_DESTROY_BY_RCU
 752 #define CFS_SLAB_DESTROY_BY_RCU 0
 753 #else
 754 #define CFS_SLAB_DESTROY_BY_RCU SLAB_DESTROY_BY_RCU
 755 #endif
 756
 757 #ifdef HAVE_SB_HAS_QUOTA_ACTIVE
 758 #define ll_sb_has_quota_active(sb, type) sb_has_quota_active(sb, type)
 759 #else
 760 #define ll_sb_has_quota_active(sb, type) sb_has_quota_enabled(sb, type)
 761 #endif
 762
 763 #ifdef HAVE_SB_ANY_QUOTA_ACTIVE
 764 #define ll_sb_any_quota_active(sb) sb_any_quota_active(sb)
 765 #else
 766 #define ll_sb_any_quota_active(sb) sb_any_quota_enabled(sb)
 767 #endif
 768
 769 static inline int
 770 ll_quota_on(struct super_block *sb, int off, int ver, char *name, int remount)
 771 {
 772         if (sb->s_qcop->quota_on) {
 773                 return sb->s_qcop->quota_on(sb, off, ver, name
 774 #ifdef HAVE_QUOTA_ON_5ARGS
 775                                             , remount
 776 #endif
 777                                            );
 778         }
 779         else
 780                 return -ENOSYS;
 781 }
 782
 783 static inline int ll_quota_off(struct super_block *sb, int off, int remount)
 784 {
 785         if (sb->s_qcop->quota_off) {
 786                 return sb->s_qcop->quota_off(sb, off
 787 #ifdef HAVE_QUOTA_OFF_3ARGS
 788                                              , remount
 789 #endif
 790                                             );
 791         }
 792         else
 793                 return -ENOSYS;
 794 }
 795
 796 #ifndef HAVE_BLK_QUEUE_LOG_BLK_SIZE /* added in 2.6.31 */
 797 #define blk_queue_logical_block_size(q, sz) blk_queue_hardsect_size(q, sz)
 798 #endif
 799
 800 #ifdef HAVE_DQUOT_INIT
 801 # define ll_vfs_dq_init DQUOT_INIT
 802 # define ll_vfs_dq_drop DQUOT_DROP
 803 #else
 804 # define ll_vfs_dq_init vfs_dq_init
 805 # define ll_vfs_dq_drop vfs_dq_drop
 806 #endif
 807
 808 #ifdef HAVE_BDI_INIT
 809 #define ll_bdi_init(bdi)    bdi_init(bdi)
 810 #define ll_bdi_destroy(bdi) bdi_destroy(bdi)
 811 #else
 812 #define ll_bdi_init(bdi)    0
 813 #define ll_bdi_destroy(bdi) do { } while(0)
 814 #endif
 815
 816 #ifdef HAVE_NEW_BACKING_DEV_INFO
 817 #define ll_bdi_wb_cnt(bdi) ((bdi).wb_cnt)
 818 #else
 819 #define ll_bdi_wb_cnt(bdi) 1
 820 #endif
 821
 822 #endif /* __KERNEL__ */
 823 #endif /* _COMPAT25_H */